当这个小装置以每秒60亿周的高频速度振荡时，它表面的“压电”材料会产生一个很容易被检测到的振动电场。

As the doohickey hummed away at a very high frequency-a whopping 6 billion cycles per second-the "piezoelectric" material in it produced a warbling electric field that was easy to detect.

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振荡气体与板叠表面热交换进行声功泵热，系统通过板叠的冷、热端换热器与外界交换热量。

The heat is transferred between the oscillating gas and the surface of the stack and is pumped from the cold to the hot end.

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这种磨削加工工艺有一定的优势，但同时会在被加工表面留下往复振荡的痕迹及出现磨削力的波动较大等现象和问题。

This grinding has its merits, but its force fluctuates greatly and the trace of vibration appears on the surface of the camshaft.

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